Lexus SC II facelift (2005-2010) front controller Wiring diagrams

1 2 3 4 5 +B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CPUB 5 4 3 2 1 GND TXCT RXCK CODE +B 7 15 16 HRLY 7 6 IMO IMI AIR BAG BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLU WIRE BLU/ WHT WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) CNCL CODE RXCK TXCT AGND GND COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM INTERIOR LIGHTS SYSTEM CRA RELAY DATA DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) ED (REAR OF LEFT FENDER) EFIO EFII ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) EXTERIOR ROOM 2 R/B) LIGHTS SYSTEM FRONT CONTROLLER GRN BLK/ WIRE GRN WIRE GRN/ YEL WIRE GRY WIRE HDCY HEAD LP RELAY HEADLIGHTS SYSTEM HORN FUSE HORN RELAY HORN RLY HORNS SYSTEM HOT AT ALL TIMES HOT IN ON OR START IG (25-28 NOT USED) 29 30 31 32 33 RDA RSSI IGN FUSE IH (UNDER STEERING COLUMN) IND BZR JUNCTION CONNECTOR 2 (IN ENGINE JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LT GRN WIRE LT GRN/BLK WIRE MAIN FUSE MAIN LUGGAGE COMPARTMENT DOOR OPENER SWITCH MPX ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PNK WIRE PNK/BLU WIRE RCO (16-19 NOT USED) 20 21 22 23 24 GND RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RSSI TAIL-RLY THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) THEFT DETERRENT HORN (AT RIGHT FRONT OF ENGINE COMPT) TRANSPONDER KEY AMPLIFIER (BEHIND DASH, RIGHT OF STEERING COLUMN) TRANSPONDER KEY COIL UNLOCK WARNING SWITCH (BEHIND LEFT SIDE OF DASH) VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WIRELESS DOOR LOCK BUZZER (LEFT REAR OF SECURITY ENGINE COMPT) INDICATOR LIGHT WIRELESS DOOR LOCK CONTROL RECEIVER YEL WIRE

AFS ECU (LEFT END OF DASH) BACK-UP LIGHT SWITCH (ON TRANSMISSION) BKUP BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/RED WIRE BLU/YEL WIRE BP (AT LEFT QUARTERPANEL) COMBINATION SWITCH DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) ENGINE CANL CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FRONT CONTROLLER GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE HOT IN ON OR START DRIVE D-IG FUSE SIDE J/B (BEHIND LEFT KICK PANEL) J/C 17 (LEFT REAR OF LUGGAGE COMPT) JUNCTION CONNECTOR 25 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 5 (IN ECU BOX) LEFT BACK-UP LIGHT RIGHT BACK-UP LIGHT LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPARTMENT) LUGGAGE ROOM J/B ECU MPX P-GND PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE TILT, TELESCOPIC ECU (BEHIND LEFT END OF DASH) VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE

13 33 29 30 15 MPX 5 9 10 8 +5 RSSI DATA A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) AFS ECU (LEFT END OF DASH) AIR BAG BLK WIRE BLK/ORG WIRE BLU WIRE BLU/ORG WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) DBIL DOME FUSE DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER'S SIDE J/B ECU ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPARTMENT, FORWARD OF STRUT TOWER) FRONT CONTROLLER FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IG (BEHIND CENTER OF DASH) IGNITION KEY CYLINDER LIGHT IH (UNDER STEERING COLUMN) ILE FSPT INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 18 (RIGHT REAR OF LUGGAGE COMPT) J/C 9, 10 (BEHIND TOP LEFT END OF DASH) LEFT FOOT LIGHT LEFT VANITY LIGHT LT GRN/BLK WIRE MAP DOOR MAP MPX MPX-B ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU PBIL PERSONAL LIGHT PNK/BLU WIRE RDA RSSI RCO RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT BUCKLE SWITCH (IN RIGHT FRONT SEAT BELT BUCKLE) RIGHT FOOT LIGHT RIGHT SCUFF PLATE LIGHT RIGHT VANITY LIGHT THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) TIRE PRESSURE WARNING ECU, RECEIVER (BEHIND CENTER OF DASH, BELOW RADIO) TRANSPONDER KEY COMPUTER (LEFT SIDE OF DASH, BEHIND GAUGE ASSEMBLY) UNLOCK WARNING SWITCH VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WIRELESS DOOR LOCK CONTROL RECEIVER YEL WIRE

15 7 5 8 6 12 TAIL-RLY FMIG 5 13 2 10 12 1 SG MPX- MPX+ BUBS BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BP (AT LEFT QUARTERPANEL) CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION SWITCH COMPUTER DATA LINES SYSTEM CRA RELAY DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FRONT CONTROLLER GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HIGH MOUNTED STOP LIGHT HOT AT ALL TIMES HOT AT ALL TIMES PASSENGER SIDE J/B (BEHIND FUSE RIGHT KICK PANEL) HOT IN ON OR START IG (LEFT SIDE OF STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER JUNCTION CONNECTOR JUNCTION CONNECTOR 1 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 14 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 17 (LEFT REAR OF LUGGAGE COMPT) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LCE LP FUSE LEFT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT REAR COMBINATION LIGHT LEFT REAR SIDE MARKER LIGHT LEFT STOP LICENSE PLATE LIGHT LIGHT LT GRN/BLK WIRE LUGGAGE ROOM J/B ECU LUGGAGE ROOM J/B ECU (AT LEFT REAR CORNER OF LUGGAGE COMPT) MPX-IG FUSE OF DASH) P-GND RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT PARKING LIGHT RIGHT REAR COMBINATION LIGHT RIGHT REAR SIDE MARKER LIGHT RIGHT STOP RR J/B FUSE TAIL FUSE TAIL- LIGHT TURN SIGNAL TURN SIGNAL TAIL LIGHT VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 HORN-RLY HLHL WSH-RLY FHHI(2) AFS ECU (LEFT END OF DASH) BLK WIRE BLK/RED WIRE BLU/BLK WIRE ED (REAR OF LEFT FENDER) ENGINE ROOM R/B 2 FMIG FRONT CONTROLLER FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRY/BLU WIRE HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM HORNS SYSTEM HEADLIGHTS SYSTEM WIPER/WASHER SYSTEM HOT AT ALL TIMES HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) MPX-IG FUSE JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LT GRN/BLK WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE VIO WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WIPER/WASHER SYSTEM WSLV GND FHHI(1) HLHR TAIL-RLY FFOG-RLY YEL WIRE

BLK WIRE BLOWER MOTOR CONTROLLER BRAKE ACTUATOR BRN WIRE COMBI- NATION SWITCH COOLING FAN ECU CRANKSHAFT POSITION SENSOR SHIELD DATA LINK CONNECTOR DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) EA (REAR OF RIGHT FENDER) EC EB (RIGHT SIDE (LEFT SIDE OF CYLINDER HEAD) OF CYLINDER HEAD) ED (REAR OF LEFT FENDER) EE (REAR OF LEFT FENDER) EFI RELAY ENGINE CONTROL MODULE ENGINE HOOD COURTESY SWITCH EXHAUST GAS SENSOR FAN RELAY FRONT CONTROLLER FRONT WIPER MOTOR HEADLIGHT CLEANER CONTROL RELAY HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) SHIELD HEATED OXYGEN SENSOR (BANK 2 SENSOR 2) SHIELD IGNITION COIL, IGNITER 1 IGNITION COIL, IGNITER 7 IGNITION IGNITION CANISTER COIL, COIL, PUMP IGNITER 2 IGNITER 4 MODULE IGNITION IGNITION COIL, COIL, IGNITER 3 IGNITER 5 IGNITION IGNITION COIL, COIL, IGNITER 6 IGNITER 8 IN ECU BOX) KNOCK SENSOR (BANK 1) KNOCK SENSOR (BANK 2) SHIELD LEFT CAMSHAFT VVT POSITION SENSOR SENSOR SHIELD SHIELD LEFT FRONT PARKING LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT FRONT TURN SIGNAL LIGHT LEFT HEADLIGHT ASSEMBLY LEFT LEFT FRONT FOG HEADLIGHT LIGHT (HIGH) MULTI-DISPLAY NCA WIRE PARK/NEUTRAL POSITION SWITCH, A/T INDICATOR LIGHT SWITCH, BACK-UP LIGHT SWITCH PRESSURE SWITCH RIGHT FRONT FOG LIGHT RIGHT FRONT TURN RIGHT SIGNAL HEADLIGHT LIGHT (HIGH) RIGHT RIGHT FRONT RIGHT FRONT SIDE HEADLIGHT PARKING MARKER ASSEMBLY LIGHT LIGHT RIGHT VVT SENSOR SHIELD SKID CONTROL ECU WASHER LEVEL SENSOR WASHER MOTOR WHT WIRE WHT/BLK WIRE

AFS ECU (LEFT END OF DASH) BLK/RED WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL WIRE CRA RELAY ED (REAR OF LEFT FENDER) FFOG-RLY FHHI(1) FHHI(2) FMIG FRONT CONTROLLER FRONT FOG RELAY GRN WIRE H-LP L LWR FUSE H-LP R LWR FUSE H-LP UPR FUSE HEAD LP RELAY HLHL HLHR HOT AT ALL TIMES IF (AT LEFT JUNCTION CONNECTOR 14 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 8 (BEHIND LEFT END OF DASH) KICK PANEL) LEFT FRONT FOG LIGHT LEFT HEADLIGHT (HIGH) LEFT HEADLIGHT ASSEMBLY LT GRN/BLK WIRE MAIN FUSE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT FOG LIGHT RIGHT HEADLIGHT (HIGH) RIGHT HEADLIGHT ASSEMBLY TAIL-RLY VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

1 2 10 12 14 7 18 17 3 4 13 24 5 6 21 IG 10 8 CANL CANH 10 9 ATX+ ATX- 13 2 10 MPX- MPX+ BUBS 13 33 MPX 24 25 CANL CANH 6 3 PNK TXS- TXS+ WIRE 7 14 6 SIL CANL CANH A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) AFS ECU (LEFT END OF DASH) AIR AIR BAG SENSOR ASSEMBLY (UNDER FRONT OF CENTER CONSOLE) BAG BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMBINATION SWITCH DATA LINK CONNECTOR (DLC) 3 (BEHIND LEFT SIDE OF DASH) DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) DRIVER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FRONT CONTROLLER FRONT PASSENGER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE GTX+ GTX- PNK WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN OR OR START IG (BEHIND CENTER OF DASH) IH (UNDER STEERING COLUMN) J/C 13 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 25 LT GRN WIRE LUGGAGE ROOM J/B ECU (AT LEFT REAR CORNER OF LUGGAGE COMPT) MPX MPX-IG FUSE MULTI-DISPLAY OF LUGGAGE COMPT) ORG/ WIRE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU PNK/BLU WIRE RADIO 2 FUSE RADIO, PLAYER RED WIRE RED/BLU WIRE RED/WHT WIRE SIL SKID CONTROL ECU (BEHIND LEFT END OF DASH) SLIDING ROOF CONTROL ECU (IN LEFT REAR THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) TILT, TELESCOPIC ECU (BEHIND LEFT END OF DASH) TIRE PRESSURE MONITOR RECEIVER (BEHIND CENTER OF DASH, BELOW RADIO) TRANSPONDER KEY COMPUTER (LEFT SIDE OF DASH, BEHIND GAUGE ASSEMBLY) VIO WIRE VIO/WHT WIRE W/ NAVIGATION WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

BLK WIRE BLU WIRE COMBINATION SWITCH +B HORN SWITCH COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) ED (REAR OF LEFT FENDER) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FRONT CONTROLLER GRN WIRE GRN/YEL WIRE HORN RELAY HORN RLY HOT AT ALL TIMES JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LEFT HORN (BEHIND GRILLE) MPX ORG/ WIRE PNK WIRE RED WIRE RIGHT HORN (BEHIND GRILLE) SECURITY FUSE WHT WIRE YEL WIRE

1 20 22 21 12 15 6 17 18 TC 2 10 11 1 9 8 IG A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) AFS ECU (LEFT END OF DASH) AFS OFF SWITCH AUDIO DOOR CONTROL SWITCH BLK WIRE BLK/WHT WIRE BLU WIRE BLU/ORG WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) CIGARETTE VSC OFF LIGHTER SWITCH COMBINATION SWITCH DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPARTMENT, FORWARD OF STRUT TOWER) FRONT CONTROLLER FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ON OR START IH (UNDER STEERING COLUMN) IG (BEHIND CENTER OF DASH) II (ON LEFT SIDE DASH BRACE) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 9, 10 (BEHIND TOP LEFT END OF DASH) MPX MPX-IG FUSE MULTI- DISPLAY (W/ NAVI- GATION) ORG/ WIRE PANEL FUSE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE PNK/BLU WIRE RADIO, PLAYER RED WIRE RED/BLU WIRE RED/YEL WIRE REMOTE CONTROL MIRROR SWITCH REOS RHEOSTAT SEAT HEATER SWITCH (IF EQUIPPED) TILT, TELESCOPIC ECU (BEHIND LEFT END OF DASH) TIRE PRESSURE WARNING ECU, RECEIVER (BEHIND CENTER OF DASH, BELOW RADIO) TR+ RV TRANSMISSION CONTROL SWITCH TRANSPONDER KEY COMPUTER (LEFT SIDE OF DASH, BEHIND GAUGE ASSEMBLY) VIO WIRE VIO/WHT WIRE WHT GRN/ WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE